During October, we hosted a Data Horror Stories Contest, where thousands of individuals who have previously been burned by their data plans submitted their tales of mobile-data-overage woes.

Within those submissions, we started to see some recurring complaints about how users went over their monthly data plan limit. Below is a rundown of the most common.

Forgetting to use Wi-Fi

Have you ever turned your Wi-Fi off and realized later that you’re still using mobile data even though you’re sitting at home, 2 feet from your router? Or gone to a bar only to realize at the end of the night they had free Wi-Fi? Don’t worry, it’s happened to a lot of us.